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1 . If x = 2y = 3z = 36 then the arithmetic mean of x, y and z is:

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Answer: Option B

Explanation:

Here, y = x/2 and z = x/3 and x = 36.

So, the arithmatic mean of x, y & z = (x + y + z)/3 = (x + x/2 + x/3)/3 = 11x/18 = 11 x 36/18 = 22.

[Alternative: x = 36, y = 36/2 = 18, z = 36/3 = 12

So, mean of x, y, z = (36 + 18 + 12) / 3 = 22]